Bottle cap seal



Aug. 28, 1962 J. G. PANIAGUA BOTTLE CAP SEAL Filed Oct. 17, 1961 INVENTOR. 1/04 6. PAW/A604 Arman 5Y5.

3,51,342 Fatented Aug. 28, 1962 3,051,342 BOTTLE CAP SEAL Juan Garcia Paniagua, Tepeyac 121, Col. Leon Modcrno, Leon, Guanajuato, Mexico Filed Oct. 17, 1961, Ser. No. 145,694 2 Claims. (Cl. 215-40) This invention relates to a bottle cap seal and has as its primary object the provision of an improved substitute for the customary cork crown which fits within the cap which is affixed to bottles containing beverages such as Coca-Cola, ginger ale, or the like.

An addtiional object of the invention is the provision of a seal of this character which may be readily formed of a plastic or similar material which will effectively seal the bottle hermetically.

An additional object of the invention is the provision of a seal of this character which will afford the greatest sealing effect at the point of maximum pressure, and which will further more closely adhere to the bottle top and the cap therefor upon any increase in pressure of the contents occasioned by heat, agitation or similar causes.

Still another object of the invention is the provision of a seal of this character which is sturdy and durable in construction, reliable and efficient in operation, and relatively simple and inexpensive to manufacture and utilize.

Other objects will in part be obvious and in part be pointed out as the description of the invention proceeds and shown in the accompanying drawings wherein:

FIGURE 1 is -a top plan view of one form of seal embodying features of the instant invention.

FIGURE 2 is a bottom plan view of the seal of FIG. 1.

FIGURE 3 is a sectional view taken substantially along the line 33 of FIG. 1 as viewed in the direction indicated by the arrows.

FIGURE 4 is a sectional view of the seal inside a cap before pressure is exerted thereon to close the bottle.

FIGURE 5 is a view similar to FIG. 4 but showing the seal after pressure has been exerted to close the same.

FIGURE 6 is an enlarged sectional view showing a detail of construction before pressure is applied thereto; and

FIGURE 7 is a view similar to FIG. 6 showing the configuration thereof after the application of pressure.

Similar reference characters refer to similar parts throughout the several views of the drawing.

Having reference now to the drawings in detail, the cap of the instant invention is generally indicated at 10 and comprises basically a flat disc 11 of plastic or similar compressible material. On its underside the disc is provided with a plurality, illustratively, three, of tapered sealing rings :12, which rings are concentric with the cap and positioned at the point where the cap contacts the bottle top rim.

The opposite side of the seal includes a circular flange 13 which extends entirely about the periphery thereof, and is tapered as at 14 toward the outer edge of the disc 11. Centrally of the disc there are provided a plurality of projections or fingers 15 which increase in both length and diameter from the rim of the disc toward the center. These projections tend to engage the underside of the cap 16, as best shown in FIG. 4 when the tapered rings 12 engage the top of the bottle. As pressure is exerted in the conventional manner either by machine or manually, to seal the bottle, the annular ring 13 expands slightly and is compressed tightly against the underside of the cap 16. Simultaneously, the tapered rings 13 are compressed tightly against the top 17 of the bottle B which is to be sealed. The larger or taller projections 15 in the center of the cap before pressure is exerted thereon tend to cause the disc 11 to assume an inwardly convexed configuration, which configuration is exaggerated when the cap is firmly sealed thereon. As best shown in FIGS. 6 and 7, the fingers 15 take the form of truncated cones initially before the exertion of pressure thereon, but, after pressure is applied thereto, expand laterally or in a transverse direction as indicated at 18 to assume a somewhat barrel-like shape.

By virtue of this arrangement a tight seal is exerted between the cap and the top of the bottle, and any increase in pressure occasioned in the bottle by conditions of temperature or agitation of the bottle or other causes will simply cause the fingers 15 to compress more tightly against the underside of the cap 16 and reduce the inward convexity of the disc 11 without blowing the cap off the bottle, as frequently occurs under conditions where conventional seals are employed.

From the foregoing it will now be seen that there is herein provided an improved seal for bottle caps which accomplishes all the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative, and not in a limiting sense.

I claim:

1. In a bottle cap seal, a disc of flexible material having planar surfaces on opposite sides thereof, a series of integral concentric rings on the underside of said seal, an annular rim about the upper side of said seal extending upwardly from the marginal edge thereof, and a plurality of vertically extending resilient fingers carried by the top of said seal in perpendicular relation to the planar surface thereof and disposed within the area defined by said annular rim, said fingers being in the form of truncated cones, and decreasing in length and diameter from the center of the disc toward the periphery.

2. In a bottle cap seal, a disc of flexible material having planar surfaces on opposite sides thereof, a series of integral concentric rings on the underside of said seal, an annular rim about the upper side of said seal extending upwardly from the marginal edge thereof, and a plurality of vertically extending resilient fingers carried by the top of said seal in perpendicular relation to the planar surface thereof and disposed within the area defined by said annular rim, said fingers being in the form of truncated cones, and decreasing in length and diameter from the center of the disc toward the periphery, said annular rim tapering downwardly toward the edge of said disc.

References Cited in the file of this patent UNITED STATES PATENTS 2,768,762 Guinet Oct. 30, 1956 FOREIGN PATENTS 1,209,772 France Sept. 21, 1959 1,249,375 France Nov. 13, 1959 

